Case Study: High-Performance PDC Bit (A2172) Delivers Exceptional ROP in Benxi Formation
Client Overview
Client: A leading onshore oil & gas drilling contractor in East China
Well Information: Well No. Su 75-46-20X, Target Formation: Benxi Formation
Bit Spec: 8-1/2" 2SD6545 PDC Drill Bit (Bit No. A2172)
Service Team: Shaanxi Hainaisen Petroleum Technology Co., Ltd.
Project Challenge
The client faced persistent drilling inefficiencies in the Benxi Formation, a complex lithological formation characterized by alternating hard and soft rock layers with high abrasiveness. Previous PDC bits struggled with:
- Low Rate of Penetration (ROP): Average mechanical 钻速 failed to meet project timeline targets
- Short Bit Life: Premature wear and breakdowns led to frequent trips, increasing non-productive time (NPT)
- High Drilling Costs: Frequent bit replacements and extended rig time inflated overall project expenses
The client required a high-reliability PDC bit solution that could maintain consistent performance through the Benxi Formation’s challenging geology while maximizing operational efficiency.
Our Solution
Shaanxi Hainaisen’s engineering team conducted a comprehensive formation analysis and customized the 8-1/2" 2SD6545 PDC bit (A2172) to address the client’s specific drilling conditions:
- Customized Bit Design: Optimized cutter density and cutter placement to handle the Benxi Formation’s alternating rock properties, ensuring stability in both hard and soft intervals
- Premium Material Selection: Implemented high-impact PDC cutters with enhanced wear resistance to combat abrasion in the formation
- Precision Engineering: Rigorous quality control during manufacturing to meet API standards, with customized hydraulics to improve cleaning and cooling in the bottom hole assembly (BHA)
Execution & Results
The A2172 PDC bit was deployed in the well section 3410m (well depth segment 3813) of Well Su 75-46-20X. After on-site implementation, the results exceeded all client expectations:
| Key Metric | Actual Performance | Client’s Previous Benchmark | Improvement |
|---|---|---|---|
| Total Drilling Depth | 403 meters | 280-320 meters per bit | +25%+ |
| Pure Drilling Time | 39 hours | 55-65 hours per bit | -40% |
| Mechanical ROP | 10.33 m/h | 5.5-6.8 m/h | +52% |
| Trip Frequency | 1 time (single bit run) | 2-3 times per section | -66% |
Client Feedback
“The 8-1/2" 2SD6545 PDC bit (A2172) from Shaanxi Hainaisen completely transformed our drilling efficiency in the Benxi Formation. We achieved a mechanical ROP of 10.33 m/h—nearly double our previous results—while cutting drilling time by over 16 hours for this section. The bit’s durability eliminated unnecessary tripping, reducing rig costs significantly. Hainaisen’s technical support and customized solution were instrumental in meeting our project deadlines, and we will definitely continue partnering with them for future PDC bit needs.”
Project Value
- Cost Savings: Reduced NPT by ~40% and cut bit replacement costs by 60% compared to prior solutions
- Operational Efficiency: Achieved the highest ROP in the client’s recent Benxi Formation wells, accelerating overall project timeline by 12%
- Long-Term Partnership: Established a trusted collaboration between the client and Shaanxi Hainaisen, with plans to deploy the same bit design in additional wells in the region
Why Shaanxi Hainaisen?
As a professional PDC bit manufacturer and drilling solutions provider, Shaanxi Hainaisen combines on-site engineering expertise with advanced manufacturing capabilities. Our team works closely with clients to analyze formation data, customize bit designs, and deliver end-to-end support—ensuring optimal performance and maximum ROI for every drilling project.
Whether for onshore oil & gas, coalbed methane, or geothermal drilling, Shaanxi Hainaisen delivers tailored PDC bit solutions that outperform industry standards in even the most challenging formations.
